EXPLANATION OF PLATE VII. 



Bones of Ornilhosaurians and Sauro2>lcr>,giaus, one-half natural size, excepting Figs. 3-4, which are natural 



size. 



Fig. 1. Wing-metacarpal of Plcroilactyhis nnibrosus, Cope, from below. 

 '2. Phalange of first rank of the same digit. 



3. Lateral carpal of the same, natural size. 



4. Phalange of clawed digit of same individual. 



5. Wing-metacarpal of Ptcrodactyhis occideiilaJis, from below. 



(i. First phalange of wing-finger of same, but doubtfully of the same individual. 

 7. Polycolylus lalqnnnis, humerus from inner side ; 7 a, from edge. 



